The20.5'' standard oar sleeve fits a shaft diameter of 1 7/8'' with or without rope wrap. A measurement of 20.5'' or greater is needed from end of handle(beginning of shaft) to oar stop.
The26.5'' standard oar sleeve fits a shaft diameter of 1 7/8'' with or without rope wrap. A measurement of 26.5'' or greater is needed from end of handle(beginning of shaft) to oar stop.
Square top oar sleeves only fit square top oars. A measurement of 26.5'' or greater is needed from end of handle(beginning of shaft) to oar stop.